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Cape Backdraft Dampers

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The Cape Backdraft Damper is an in-line, one way air flow valve which opens and closes with minimal pressure in either direction. It works better than other dampers at stopping undesired airflow in that it allows unrestricted airflow in the desired direction without reducing system efficiency. It's silent, produces no metal clanging sounds, tested to UL723 standards and can be installed in horizontal or vertical ductwork.

Our dampers do not rust nor require any maintenance and will fit inside a 4, 5, 6, 7 or 8-inch duct.